Metering pump

ABSTRACT

The present invention relates to a metering pump for continuously feeding a predetermined amount of a fluid. The present invention uses a used tire as a compression member  200   b  including a compression chamber  200   a  for pumping fluid. Fluid may be continuously pumped in a unit of a predetermined amount by check valves v 1  and v 2  of a fluid introduction pipe  401  and a fluid discharge pipe connected to the compression chamber  200   a  by a flexible operation of the compression member  200   b  by performing a reciprocating motion for a shaft  305  connected to a crank  303  cooperating with a plurality of compression members  200   b  by a drive motor in an axial direction of the compression member.

BACKGROUND OF THE INVENTION

1. Field of the invention

The present invention relates to a metering pump for continuouslyfeeding a predetermined amount of a fluid. More particularly, to a fluidmetering pump for dosing-feeding the fluid (waste water) so thatcoagulant fed in a chemical treatment bath and waste water are mixedwith each other having a predetermined ratio in order to remove a sludgecontained in the waste water by coagulating the sludge.

2. Related Art

Generally, domestic sewage or industrial wastewater for protecting waterquality, waste water such as animal manure is purified with a dischargelevel or is purified to heavy water so that the purified water may berecycled as water for cleaning a road, wash water for a toilet or waterfor roadside tree or water for planting trees in a park.

Various purifying schemes are applied according to the type andpollution extent of pollution sources in order to purify water quality.For example, since contamination concentration of manure is serious,waste water such as livestock manure is after impurities and othercontaminants are removed in a physical or chemical method before aprocess of purifying the waste water, the waste water is purified bysteps.

As described above, in order to remove the sludge contained in the wastewater, the sludge is coagulated by feeding a coagulant into a processtub in which the waste water is introduced. In this case, a coagulatingefficiency of the sludge may be efficiently expected by suitablyadjusting an introduction amount of the coagulant according to an amountof the waste water fed in a chemical treatment bath or according topollution sources and pollution concentration of the waste water butthere is no problem to remove the sludge of a small amount of the wastewater. However, it is difficult to rapidly remove the sludge included inlarge capacity waste water associated with a post process.

For example, the sludge removal method includes a physical filteringmethod for feeding a sludge or impurities using a filtering net where awire is horizontally or vertically woven or filtering the sludge or theimpurities and a method of removing the sludge by feeding a drug tocoagulate the sludge. The physical filtering method may rapidly removethe sludge or the impurities but a pipe is clogged due to a coagulatedsludge so that a sludge coagulating removal method due to the coagulantis widely used.

However, when an introduction amount of the coagulant is excessive ascompared with an amount of the waste water, it is difficult to dehydratethe waste water during an operation of a dehydration device. Incontrast, a cohesive force of the sludge becomes weak so that a largeamount of the sludge is included in the dehydrated waste water, therebyincreasing a processing load in a post waste water treatment process.

For example, referring to FIG. 1, the waste water introduced into theexisting drug treatment tank 3 is overflown in a triangle scheme to bedischarged to the dehydration device. In this case, a water level of thedrug treatment tank 3 is reduced to a predetermined water level orlower, the feed pump 4 is operated (water level sensor (no referencenumeral) in the drug treatment tank 3 so that the waste water stored ina deposition tank 1 is transferred to the drug treatment tank 3. Anamount of the waste water introduced into the drug treatment tank 3 inthe feed pump 4 is irregular in an operation interval (operation andstop intervals of the feed pump). In FIG. 1, reference numeral 5represents a dehydration device which separates the waste water in aliquid state from the sludge by dehydrating the coagulated sludge.

In addition, a water amount irregular phenomenon of the waste water isgenerated due to a pressure difference according to change in a waterlevel of the waste water introduced into the deposition tank 1. In otherwords, the deposition tank 1 operating in places such as sewagetreatment plant has high capacity wherein a height is in the range of 7m to 10 m and a length and breadth has 15 m×20 m, a width of waterpressure change is very large due to a water level difference.

Change in a water amount due to water pressure may be solved by equallyinstalling the water level of the deposition tank 1 and the water levelof the drug treatment tank 3. However, there is a plurality of caseswhich cannot be applied to treatment of the waste water, such as a caseof transferring underground waste water to the ground or a higher place.

Since change in water pressure is applied to an inside of the feed pump4, a head of the pump is changed due to water pressure applied to a pumpas well as a head of the pump.

Since miscellaneous objects including earth and sand, metals such asforks or chopsticks, nails, nuts, screws, toys formed of syntheticresin, a resin rubber household goods such as kitchen containers, bottlecaps, packaging of plastic materials, fabrics such as stockings, socks,cans for beverages are introduced in a general deposition tank togetherwith the waste water, a pump for feeding the waste water is excessivelyworn during driving regardless of the type of a pump.

That is, internal sealing or impeller, an inner wall between theimpeller and a compression chamber, and a surface of a shaft forrotating the impeller are excessively worn due to foreign substancescontained in a deposited object, so that head reduction of the pump isgenerated, and a feed amount of the waste water by a pump according towater pressure of the deposition tank 1 operating in the pump ischanged. Accordingly, a mixed ratio of the waste water transferred tothe drug treatment tank 3 to a coagulant is abnormal.

Accordingly, although an abrasion problem and a life shortening problemof the pump due to foreign substances or impurities included in thewaste water are inevitably generated, there is a need for a human powerto manage a feed amount of the coagulant in order to efficientlycoagulate and remove the sludge included in the waste water. If it isconsidered that automation of a waste water processing device islimited, it is very important to manage a feed amount of the coagulantand a coagulating efficiency of the sludge and the solution thereof isrequired.

SUMMARY OF THE INVENTION

The present invention provides a metering pump capable of continuouslyfeeding a fluid having a predetermined amount in a use environment toalways uniformly feed a flow rate of waste water into a drug treatmenttank which is fed during a drag processing procedure.

The present invention further provides a metering pump including a usedtire capable of reducing generation of garbage and preventingenvironment pollution by recycling the used tire as a compression memberof a pump for pumping fluid.

a hollow compression member 200 b manufactured by a rubber materialwhich has flexibility and restoring ability, and sealing property;

upper/lower sealing members 204 a and 204 b coupled with an outerperipheral portion of the compression member 200 b to seal a compressionchamber 200 a;

a drive motor 300 including a drive shaft 301 axially supported by asupport bridge 310 and coupled with a crank 303 and a shaft 305rotatably connected to the crank 303 and the upper sealing member 204 a;

a fluid feeding pipe 400 including a fluid introduction pipe 401 and afluid discharge pipe 402 connected to the lower sealing member 204 b;and

check valves v1 and v2 coupled with the fluid introduction pipe and thefluid discharge pipe 402 to open a pipe passage so that fluid flows intoor outward from the compression chamber 200 a.

It may be preferable that the compression member may use to reducegeneration of garbage and prevent environment pollution

The present invention may further include a guide part provided betweenthe upper/lower sealing members to improve compression property,flexibility, and restoring ability of the compression member.

Further, in the present invention, a plurality of compression membersare connected to a single drive motor, and the respective compressionmembers sequentially perform a pumping operation with a time differenceso that a predetermined amount of the fluid may be fed without purging.

It is preferable that the check valve v1 is a check valve to introducethe fluid into the compression chamber, and the check value v2 is acheck value to open a pipe passage to discharge the fluid introducedinto the compression chamber to only an outside of the compressionchamber.

Advantageous Effects

The present invention may feed a predetermined amount of fluid by asequential pumping operation of a plurality of compression memberswithout surging in the fluid by sequentially operating the compressionmembers by a single drive motor.

Accordingly, the present invention is significantly advantageous in atechnical field to continuously feed a predetermined amount of wastewater to be fed to the drug treatment tank in a waste water processingdevice.

Further, since the present invention may adopt a used tire as acompression member configuring a compression chamber to reduceenvironment pollution and an amount of garbage, the present inventionmakes contribution to industrial development. Increased garbage may bereduced by recycling used tire garbage induced from increased used of avehicle and an environment pollution problem due to the used tire may bereduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a layout view illustrating a waste water processor forcoagulating a sludge included in waste water using a drug according tothe related art;

FIG. 2 is a partially cut-way sectional view illustrating a basicconfiguration of a metering pump according to an embodiment of thepresent invention;

FIG. 3A is a plan view illustrating a compression chamber of themetering pump according to an embodiment of the invention;

FIG. 3B is a transverse plan view illustrating a compression chamber ofa metering pump according to an embodiment of the invention;

FIG. 4 is an enlarged sectional view illustrating a metering pumpaccording to an embodiment of the invention;

FIGS. 5A and 5B are perspective views illustrating a waste water inletpipe and a waste water outlet pipe connected to a compression chamber ofa metering pump according to an embodiment of the invention,respectively;

FIG. 6 is a partially sectional view illustrating an example of ametering pump according to an embodiment of the invention; and

FIG. 7 is a side view illustrating a metering pump according to anexemplary embodiment of the invention.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, a metering pump according an embodiment of the presentinvention will be described with reference to accompanying drawings.

Referring to FIGS. 2 to 4, FIG. 2 is a partially cut-way sectional viewillustrating a basic configuration of a metering pump according to anembodiment of the present invention, FIG. 3A is a plan view illustratinga compression chamber of the metering pump according to an embodiment ofthe invention, FIG. 3B is a transverse plan view illustrating acompression chamber of a metering pump according to an embodiment of theinvention, and FIG. 4 is an enlarged sectional view illustrating ametering pump according to an embodiment of the invention. The meteringpump 100 according to the present invention includes a compressionmember 200 b including a compression chamber 200 a for pumping wastewater, a drive motor 300 for pumping a fluid by driving the compressionmember 200, and a pipe 400 provided so that a fluid is introduced anddischarged into and from the compression member 200.

The compression member 200 b has a ring shaped section and ismanufactured by a flexible material such as a rubber to form acompression chamber 200 a, and includes upper/lower sealing members 204a and 204 b coupled with both peripheral portions 201 of the compressionmember 200, respectively.

It is preferable that the compression member 200 b includes a rubbermaterial which has flexibility and restoring ability and has relativelyexcellent abrasion resistance and sealing property.

In the present invention, as an example of the compression member, asshown in FIG. 3A, FIG. 3B, and FIG. 4, a used tire (not shown) is used.

The compression member 200 b is specially manufactured to have a ringshape which includes flexibility, restoring ability, compressionproperty, and sealing property as well as the used tire, and adescription of a method of manufacturing the compression member 200 band a product thereof are omitted.

However, the used tire may represent a predetermined stiffness by athread pattern making contact with the ground and an internally insertedsteel core (carcass), may have flexibility, compression property, andsealing property to represent basic physical properties of thecompression chamber according to fluid pumping. Furthermore, asillustrated in a section of the compression member 200 b, the used tirehas a hollow space, and the hollow space may be used as the compressionchamber 200 a. Moreover, since the used tire has more excellentflexibility in an axial direction than a radial direction, if pressureis radially applied to the use tire, an inside of the used tire iscontracted. If the pressure is removed, the used tire has excellentrestoration force which is restored to an original state. If a pas (holeor a region having a piece) is included in the used tired or the tire isnot a used tire where a sealing property (with a hole), the used tiremay be used as it is.

The upper/lower sealing members 204 a and 204 b are coupled with bothperipheral regions of the compression 200 b to seal an inside of thecompression member 200 b. Peripheral regions of the upper/lower sealingmembers 204 a and 204 b are coupled with an outer peripheral region ofthe compression member 200 b.

The upper/lower sealing members 204 a and 204 b scatter pressure to anouter surface and scatter the pressure applied by a drive motor in aradial direction of the compression member. The upper/lower sealingmembers 204 a and 204 b are provided therein with reinforcing members201 a and 201 b to maintain a shape of the compression member not to bemodified upon compression operation of the compression member 200 b andto reinforce stiffness of the compression member.

Although the upper/lower sealing members 204 a and 204 b may not includethe reinforcing members 201 a and 201 b, it is preferable that theupper/lower sealing members 204 a and 204 b are provided therein withthe reinforcing members 201 a and 201 b.

As shown in FIG. 3A and FIG. 4, the reinforcing member 201 a of theupper sealing member 204 a is provided therein with a bearing 203connected to electric power of a drive motor 300 shown in FIG. 2. Wastewater feed pipe 400 shown in FIG. 5A and FIG. 5B is connected to thelower sealing member 204 b.

An inside of the compression member 200 b maintains a sealing state bycoupling the upper/lower sealing members 204 a and 204 b so that acompression chamber 200 a is provided.

A pipe 400 shown in FIG. 5A represents an introduction pipe 401 wherewaste water is introduced into the compression member 200 b. A pipe 400shown in FIG. 5B represents a discharge pipe 402 to discharged wastewater in the compression member 200 b to the outside.

Referring to FIG. 5A and FIG. 5B, branch pipes 401 a and 402 a areconnected to a surface of the lower sealing member 204 b to be spacedapart from each other at a predetermined angle, and check valves v1 andv2 are coupled with the branch pipes 401 a and 402 a.

The check valve v1 is an unidirectional check valve which is coupledwith an end of the branch pipe 401 a, and opens a pipe passage so thatwaste water is introduced into the compression chamber 200 a. The checkvalve v2 is a unidirectional fluid flow control check valve which iscoupled with an end of the branch pipe 401 a of the discharge pipe 401and open a pipe passage so that the waste water is discharged to anoutside of the compression chamber 200 a.

A guide part 205 a may be provided between the upper/lower sealingmembers 204 a and 204 b.

The guide part 205 a is advantageous to stably maintain a flexibleoperation of the compression member 200 b upon flexible operation of thecompression member 200 b.

In an example of the guide part 205 a, as shown in FIG. 4, an alignmentshaft 206 having a predetermined length is provided at a bottom surfaceof the upper sealing member 204 a. The guide part 205 a may beimplemented by providing a guide shaft 207 including a shaft hole 208for slidably receiving an outer diameter of the alignment shaft 206 at asurface of the lower sealing member 204 b and installing a compressionspring 205 around the alignment shaft 206 and the guide shaft 207between the upper/lower sealing members 204 a and 204 b.

In FIG. 2 and FIG. 4, reference numeral 208 represents a fixing framefixed to the ground by a bolt 209 and fixes the lower sealing member 204b so that the lower sealing member 204 b is not moved.

As shown in FIG. 2 and FIG. 6, the above compression member 200 bperforms a pumping operation according to rotational force of the drivemotor 300.

The drive motor 300 is firmly fixed to a fixed frame 306 by a bolt. Adrive shaft of the drive motor is rotatbly supported by a bearing 304 ofa support bridge 310 shown in FIG. 2.

A crank 303 is provided at the above drive shaft 301 and a shaft 305connected to the bearing 203 is rotably connected to the crank 303.

Upon rotation of the drive motor 300, the drive shaft and the crank 303are rotated so that the shaft 305 starts a reciprocating motion upwardand downward.

The shaft 205 performs the reciprocating motion upward and downward tocontinuously repeat an elevation motion for compressing the uppersealing member 204 a and releasing the compression.

If pressure is changed so that pressure in a compression chamber 200 aof the compression member is reduced due to an elevation motion of theupper sealing member 204 a, the waste water is introduced into thecompression chamber 200 a through the branch pipe 401 a of theintroduction pipe 401. In contrast, when the pressure in the compressionchamber 200 a is increased, the waste water introduced into thecompression chamber is discharged to the discharge pipe 402 through eachbranch pipe 402 a.

The waste water pumped from the compression chamber by opening aninverse pipe passage of the check valves v1 and v2 coupled with twobranch pipes does not reversely flow but a fluid pumping function isperformed.

For the reference, the waste water introduced into the introduction pipe401 is filtered and removed before impurities and foreign substanceshaving a relative large volume included in the waste water areintroduced into the introduction pipe so that an opening/closingfunction of the pipe passage of the check valves v1 and v2 is notinterfered.

Referring to FIG. 6, FIG. 6 illustrates a metering pump 100 including apair of compression members 200 b. Left and right drive shafts 301 ofthe drive motor 300 are supported by a support bridge 310. As describedabove, after a crank 303 is provided at the drive shaft 301, a pumpingfunction of the two compression members 200 b may be implemented bydriving one drive motor 300 by connecting a shaft 305 between the uppersealing member 204 a and the crank 303.

In this case, a disposal angle of angle crank 303 is connected to thedrive shaft 301 (being inverse at 180°) so that the two shafts 305alternately perform a reciprocating motion.

In addition, it is preferable that a length of the shaft 305 isadjusted.

To adjust the length of the shaft 305 is advantageous to adjust acompression range (width) of the compression member 200 b, and to adjusta head of a pump.

Further, introduction pipes 401 of waste water introduced into the twocompression members 200 b is connected to fluid discharge pipes 402 towhich the waste water is discharged to the outside in a compressionchamber 200 a by pumping operation of the compression members 402 sothat the introduction pipes 401 of waste water and fluid discharge pipes402 are integrated as one.

Further, a fluid may be continuously pumped according to a sequentialpumping function of three compression members by connecting threecompression members 200 b to a drive shaft 301 of one drive motor 300and rotating the crank 303 while changing a rotation time difference ofangle crank 303.

Accordingly, a predetermined amount of the fluid pumped by threecompression members 200 b may be continuously fed without purging. Thepurging of the fluid may be flexibly controlled by a person havingordinary skill in the art to which the invention pertains if at leastthree compression members 300 b are provided.

As described above, the technical scope intended from inventors of thepresent invention has no intention to limit the present invention but isspecifically advantageous to feed a predetermined amount of waste waterproportional to a feed amount of a coagulant.

Further, since the metering pump according to the present invention isvery simple in a configuration side, when the metering pump is damageddue to abrasion of a compression chamber or fatigue of the compressionmember, the exchange is easy and it is very cheap to maintain the pump.

In addition, the present invention may reduce an environment problem dueto a used tire garbage being industrial waste and generation of thegarbage by manufacturing a pump using a used tire. The metering pumpusing the used tire may make contributed to industrial development.

What is claimed is:
 1. A metering pump for feeding fluid comprising: ahollow compression member 200 b manufactured by a rubber material whichhas flexibility and restoring ability, and sealing property; upper/lowersealing members 204 a and 204 b coupled with an outer peripheral portionof the compression member 200 b to seal a compression chamber; a drivemotor 300 including a drive shaft 301 axially supported by a supportbridge and coupled with a crank 303 and a shaft 305 rotatably connectedto the crank and the upper sealing member; a fluid feeding pipe 400including a fluid introduction pipe 401 and a fluid discharge pipe 402connected to the lower sealing member 204 b; and check valves v1 and v2coupled with the fluid introduction pipe and the fluid discharge pipe402 to open a pipe passage so that fluid flows into or outward from thecompression chamber 200 a.
 2. The metering pump of claim 1, wherein thedrive motor 300 further comprises an angle crank 303 connected to driveshafts 301 of at least three drive motors to sequentially pump at leastthree compression members 200 b and a shaft 305 connected between theangle crank and the upper sealing member 204 a.
 3. The metering pump ofclaim 1, wherein the compression member 200 b comprises a used tire. 4.The metering pump of claim 1, wherein the compression member 200 bfurther comprises a guide part 205 a.
 5. The metering pump of claim 4,wherein the guide part 205 a comprises an alignment shaft 206 having apredetermined length attached to a bottom surface of the upper sealingmember 204 a; a guide shaft 207 coupled with a surface of the lowersealing member 204 b and including an axial hole 208 to slidably receivean outer diameter of the alignment shaft 206; and a compression spring205 coupled around the alignment shaft 206 and the guide shaft 207.